Taking values from a Matrix and Inputting into an equation, using Loops

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RS
RS 2020-7-23
评论： Serhii Tetora 2020-7-23
Hello.
I have a matrix say: A = [1 2 3 4 5 6 7] and an eqaution y = x^2
I need to find a way to take each value of the matrix and input it into y in an automated way, say using For loops. I am also trying to do this by not making the resulting values of y as a matrix i.e. I just want the answer y gives for each value taken from a to be stored as a number and not a matrix.
I am a relative beginner to MATLAB and have no idea how to do this.
Any help greatly appreciated.

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采纳的回答

Serhii Tetora
Serhii Tetora 2020-7-23
A = [1 2 3 4 5 6 7];
for i = 1:length(A)
x = A(i);
y(i) = x^2;
end
y
  2 个评论
RS
RS 2020-7-23
This results in y = [1 4 9 16 25 36 49] which is a matrix
Is there any way I can take each of the answers of this matrix and store it as a different new variable using loops, for example:
Ans1 = 1
Ans2 = 4
Ans3 = 9
etc

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更多回答（1 个）

William Alberg
William Alberg 2020-7-23
Hello Omar
If you want to replace "y" with one of the values in "A", you can do it the following way:
A = 1:7;
syms x y
eq = y == x^2;
for i = 1:length(A)
eq_temp = subs(eq, y, A(i))
end
If you want to calculate y, i would recommed doing it the following way, where "y = f(x)":
f(x) = x^2;
for i = 1:length(A)
val_temp = f(A(i))
end

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